Weather tomorrow: Portland
Forecast for tomorrow, 28 September: overcast and light rain. The daily air temperature range is 10 to 13 °C. Chance of precipitation tomorrow according to the daily forecast: 92%. Forecast precipitation amount: 7.9 mm. Wind from the northeast at 5 m/s.
monday 28 september
Overcast and light rain
+13°
+10°
Sunset 18:27
G/m activity 2
Precipitation probability 92%
Precipitation 7.9 mm
Wind
5 m/s
Pressure 1013.3 hPa
Index UV 1
Humidity 97%
Sunrise 06:35
Moon Waning Gibbous
Sunrise 06:35
Sunset 18:27
G/m activity 2
Moon Waning Gibbous
00:00
13°
NE
5.8 m/s01:00
13°
NE
5.6 m/s02:00
13°
NE
5.3 m/s03:00
13°
NE
5.3 m/s04:00
12°
NE
5 m/s05:00
12°
NE
4.4 m/s06:00
12°
NE
4.4 m/s07:00
12°
NE
4.2 m/s08:00
12°
NE
4.2 m/s09:00
12°
NE
4.7 m/s10:00
11°
NE
4.4 m/s11:00
11°
NE
4.4 m/s12:00
11°
NE
4.2 m/s13:00
11°
NE
4.2 m/s14:00
11°
N
4.4 m/s15:00
11°
N
4.2 m/s16:00
11°
N
4.7 m/s17:00
11°
N
4.7 m/s18:00
11°
N
4.4 m/s19:00
11°
N
4.2 m/s20:00
11°
N
3.9 m/s21:00
11°
N
3.9 m/s22:00
11°
N
3.6 m/s23:00
11°
N
3.3 m/sWhat is the atmospheric pressure in Portland tomorrow?
Pressure adjusted for location elevation. Location elevation: 22 m relative to sea level
Forecast for 28.09.2026 · Local time
Pressure: 1013.3–1014.6 hPa.
Minimum: 1013.3 hPa00:00–08:00Also at other hours
Maximum: 1014.6 hPa09:00–13:00Also at other hours
Largest change over 3 hours:
+1.3 hPa · 06:00–09:00
First of 10 intervals with the same change magnitude shown.
hPa · Change over the previous 3 hours
Colours show pressure relative to this day’s range
Lower · 1013.3 Scale midpoint · 1013.9 Higher · 1014.6 Largest change over 3 hoursWhat is the chance of precipitation in Portland tomorrow?
Chance of precipitation tomorrow according to the daily forecast: 92%.
Precipitation for tomorrow
| 00:00 | Amount of precipitation in millimeters (mm): 0.8 mm | Probability of precipitation in percent (%): 71% |
|---|---|---|
| 01:00 | Amount of precipitation in millimeters (mm): 0.8 mm | Probability of precipitation in percent (%): 72% |
| 02:00 | Amount of precipitation in millimeters (mm): 0.4 mm | Probability of precipitation in percent (%): 58% |
| 03:00 | Amount of precipitation in millimeters (mm): 0.4 mm | Probability of precipitation in percent (%): 58% |
| 04:00 | Amount of precipitation in millimeters (mm): 0.3 mm | Probability of precipitation in percent (%): 55% |
| 05:00 | Amount of precipitation in millimeters (mm): 0.3 mm | Probability of precipitation in percent (%): 57% |
| 06:00 | Amount of precipitation in millimeters (mm): 0.3 mm | Probability of precipitation in percent (%): 58% |
| 07:00 | Amount of precipitation in millimeters (mm): 0.4 mm | Probability of precipitation in percent (%): 62% |
| 08:00 | Amount of precipitation in millimeters (mm): 0.5 mm | Probability of precipitation in percent (%): 65% |
| 09:00 | Amount of precipitation in millimeters (mm): 0.3 mm | Probability of precipitation in percent (%): 56% |
| 10:00 | Amount of precipitation in millimeters (mm): 0.3 mm | Probability of precipitation in percent (%): 55% |
| 11:00 | Amount of precipitation in millimeters (mm): 0.1 mm | Probability of precipitation in percent (%): 44% |
| 12:00 | Amount of precipitation in millimeters (mm): 0.2 mm | Probability of precipitation in percent (%): 47% |
| 13:00 | Amount of precipitation in millimeters (mm): 0.2 mm | Probability of precipitation in percent (%): 51% |
| 14:00 | Amount of precipitation in millimeters (mm): 0.2 mm | Probability of precipitation in percent (%): 49% |
| 15:00 | Amount of precipitation in millimeters (mm): 0.2 mm | Probability of precipitation in percent (%): 47% |
| 16:00 | Amount of precipitation in millimeters (mm): 0.1 mm | Probability of precipitation in percent (%): 45% |
| 17:00 | Amount of precipitation in millimeters (mm): 0 mm | Probability of precipitation in percent (%): 38% |
| 18:00 | Amount of precipitation in millimeters (mm): 0 mm | Probability of precipitation in percent (%): 37% |
| 19:00 | Amount of precipitation in millimeters (mm): 0.1 mm | Probability of precipitation in percent (%): 43% |
| 20:00 | Amount of precipitation in millimeters (mm): 0.1 mm | Probability of precipitation in percent (%): 46% |
| 21:00 | Amount of precipitation in millimeters (mm): 0 mm | Probability of precipitation in percent (%): 38% |
| 22:00 | Amount of precipitation in millimeters (mm): 0.1 mm | Probability of precipitation in percent (%): 41% |
| 23:00 | Amount of precipitation in millimeters (mm): 0.2 mm | Probability of precipitation in percent (%): 49% |
Portland weather tomorrow: morning, afternoon and evening
Morning: overcast and light rain, +12 °C. Afternoon: overcast and light rain, +11 °C. Evening: overcast and showers, +11 °C.
According to the hourly forecast, tomorrow's highest temperature is expected from 00:00 to 03:00, at around +13 °C. Times are local.
Tomorrow's strongest winds are expected at 00:00 (from the northeast). The lightest winds are expected at 23:00 (from the north). Times are local.
Temperature and wind for tomorrow
What geomagnetic activity is forecast for Portland tomorrow?
The highest forecast Kp index for tomorrow is 2.
